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Volume 21 (2020): Edizione 4 (December 2020)

Volume 21 (2020): Edizione 3 (June 2020)

Volume 21 (2020): Edizione 2 (April 2020)

Volume 21 (2020): Edizione 1 (February 2020)

Volume 20 (2019): Edizione 4 (December 2019)

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Volume 20 (2019): Edizione 2 (April 2019)

Volume 20 (2019): Edizione 1 (February 2019)

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Volume 19 (2018): Edizione 1 (March 2018)

Volume 18 (2017): Edizione 4 (December 2017)

Volume 18 (2017): Edizione 3 (September 2017)

Volume 18 (2017): Edizione 2 (June 2017)

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Volume 16 (2015): Edizione 4 (December 2015)

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Volume 15 (2014): Edizione 2 (June 2014)

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Volume 14 (2013): Edizione 4 (December 2013)

Volume 14 (2013): Edizione 3 (September 2013)

Volume 14 (2013): Edizione 2 (June 2013)

Volume 14 (2013): Edizione 1 (March 2013)

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Volume 13 (2012): Edizione 3 (September 2012)

Volume 13 (2012): Edizione 2 (June 2012)

Volume 13 (2012): Edizione 1 (March 2012)

Dettagli della rivista
Formato
Rivista
eISSN
1407-6179
Pubblicato per la prima volta
20 Mar 2000
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

Volume 16 (2015): Edizione 1 (March 2015)

Dettagli della rivista
Formato
Rivista
eISSN
1407-6179
Pubblicato per la prima volta
20 Mar 2000
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

8 Articoli
Accesso libero

Inspection Program Development for an Aircraft Fleet and an Airline on the Basis of the Acceptance Fatigue Test Result

Pubblicato online: 28 Feb 2015
Pagine: 1 - 8

Astratto

Abstract

An inspection interval planning is considered in order to limit the probability of any fatigue failure (FFP) in a fleet of N aircraft (AC) and to provide an economical effectiveness of airline (AL) under the limitation of fatigue failure rate (FFR). A solution of these two problems is based on the processing of the result of acceptance fatigue test of a new type of aircraft. During this test an estimate of the parameter ϴ, of a fatigue crack growth trajectory has been obtained. If the result of this acceptance test is too bad then this new type of aircraft will not be used in service. A redesign of this project should be done. If the result the acceptance test is pretty good then the reliability of the aircraft fleet and the airline will be provided without inspections. For this strategy there is a maximum of FFP (a maximum of FFR) as a function of an unknown parameter ᶿ. This maximum can be limited by the use of the offered here procedure of the choice of the inspection number. The economic effectiveness of the AL operation is considered using the theory of Markov process with rewords.

Parole chiave

  • Monte Carlo
  • Markov chains
  • Minimax
  • inspection program and approval test
  • fleet reliability
  • economic effectiveness
Accesso libero

How to Train Safe Drivers: Setting Up and Evaluating a Fatigue Training Program

Pubblicato online: 28 Feb 2015
Pagine: 9 - 20

Astratto

Abstract

Fatigue is considered as a serious risk driving behavior, causing road accidents, which in many cases involve fatalities and severe injuries. According to CARE database statistics, professional drivers are indicated as a high-risk group to be involved in a fatigue-related accident. Acknowledging these statistics, a training program on driving fatigue was organized, aiming at raising awareness of professional drivers of a leading company in building materials, in Greece. Selected experimental methods were used for collecting data before and after the training program, which allowed monitoring and assessing the potential behavioural changes. A questionnaire survey was conducted before the program implementation to 162 drivers of the company, while two months after the program, the same drivers replied to a second questionnaire. Impact assessment of the program relied on statistical analysis of the responses. Results showed the degree of penetration of the training program in the professional drivers' behavior towards safe driving.

Parole chiave

  • fatigue
  • program
  • impact assessment
  • professional drivers
Accesso libero

Travel Behaviour of Online Shoppers in Sweden

Pubblicato online: 28 Feb 2015
Pagine: 21 - 30

Astratto

Abstract

Online shopping opportunities are transforming travel behaviour for shopping and could potentially reduce the overall travel demand. Despite numerous studies on online shopping, only a few have taken an approach that includes trips for all travel purposes. Based on a web–survey, this paper provides results on travel behaviour for physical shopping for frequent, regular, and infrequent online shoppers in Sweden. The results indicate that frequent online shoppers make as many car trips (for both shopping and other errands) as others. Also, frequent online shoppers in total make as many trips to a physical store as infrequent online shoppers – although by more sustainable modes of transport – and that the time saved from online shopping is spent on both additional shopping trips and trips for other errands. The conclusion is that online shopping might facilitate changing travel behaviour but does not in itself represent a good stand–alone measure for reducing vehicle mileage.

Parole chiave

  • Online shopping
  • travel behaviour
  • modal split
Accesso libero

Analysis of Common Governance Transport System Development Possibilities in the East-west Transport Corridor

Pubblicato online: 28 Feb 2015
Pagine: 31 - 39

Astratto

Abstract

Equitable access to efficient economic infrastructure and effective public services is essential to achieving the future economic growth. Insufficient transport infrastructure and long border crossing procedures limiting international accessibility for goods and passengers are the biggest present problems in the East-West transport corridor. The joint action plan must highlight the areas and components of the transport system, which are important for the effective interconnectivity of the individual networks, and/or for absorbing the steadily increasing intraregional and transcontinental freight flows. The successful East-West transport corridor activities' governance first of all needs to identify the corridor's administrative structure, non-governmental organizations' (NGO) place in the management structure, partnerships between the transport hubs in the EWTC mechanism and the possibility of cooperation between private and public sectors.

The latest events and constantly changing environment show that the impact of political solutions on business is prevalent in the CIS and the EU countries. Thus, the analysis of economic, political, managerial, legal, even moral aspects that affect the interests of the stakeholders remain significant.

Parole chiave

  • transport corridors
  • management
  • governance
  • planning
  • infrastructure
Accesso libero

Formation of Failure Models for the Evaluation of the Reliability of Supply Chains

Pubblicato online: 28 Feb 2015
Pagine: 40 - 47

Astratto

Abstract

Logistics and supply chain management is a comparatively new scientific field which has been rapidly developing.

Apart from the criterion of total logistics costs, that is used to evaluate the efficiency of supply chains, another criterion - total satisfaction of consumer needs - is being increasingly used for the same purpose. It can be explained by the transition to such new logistics concept as the sustainability of supply chains, which is characterized not only by flexibility, rate of response, strength, adaptability, but mostly by the reliability of functioning of the logistics system's elements.

The paper presents critical analysis of the existing approaches to the formation of failure models in supply chains, the methodical approach and classification of failures for the key logistics functions (purchasing, order processing, transportation, storage, warehousing and materials handling) as well as some developed and improved failure models for a number of logistics functions and operations; there have been also given some examples of calculating the reliability indices for the elements of the supply chain.

Parole chiave

  • supply chains
  • reliability
  • failures
  • calculation models
Accesso libero

Application of EPC Standards and Mobile Networks Services to Enhance the Quality of Postal Service

Pubblicato online: 28 Feb 2015
Pagine: 48 - 60

Astratto

Abstract

This article deals with new technologies and methods to optimize the transport and delivery of postal mails. Introduction of this article defines the technologies and procedures that postal operators have started to use. The main part of the article describes specific implemented solutions of several postal operators and their benefits. The last part shows using of EPC standards in a processes chain. The conclusion of the article is devoted to the evaluation of these technologies and their potential in the area of postal sector.

Parole chiave

  • delivery mails
  • mobile technology
  • post
  • RFID technology
  • EPC standards
Accesso libero

Development of the Model of Decision Support for Alternative Choice in the Transportation Transit System

Pubblicato online: 28 Feb 2015
Pagine: 61 - 72

Astratto

Abstract

The decision support system is one of the instruments for choosing the most effective decision for cargo owner in constant fluctuated business environment. The objective of this Paper is to suggest the multiple-criteria approach for evaluation and choice the alternatives of cargo transportation in the large scale transportation transit system for the decision makers - cargo owners. The large scale transportation transit system is presented by directed finite graph. Each of 57 alternatives is represented by the set of key performance indicators Kvi and set of parameters Paj. There has been developed a two-level hierarchy system of criteria with ranging expert evaluations based on Analytic Hierarchy Process Method. The best alternatives were suggested according to this method.

Parole chiave

  • Transport model
  • transit
  • decision support
  • Baltic Sea Region
Accesso libero

Modeling of Complex Structures for the Ship's Power Complex Using Xilinx System

Pubblicato online: 28 Feb 2015
Pagine: 73 - 82

Astratto

Abstract

One of the most essential tasks for a number of systems of the automatic controls in the autonomous electric power systems of the water transport is accurate calculation of variable harmonic components in the non-sinusoidal signal. In the autonomous electric power systems operating with full semiconductor capacity, the forms of line currents and voltages are greatly distorted, and generator devices generate voltage with inconsistent frequency, phase and amplitude. It makes calculation of harmonic composition of the distorted signals be a non-trivial task. The present paper provides a mathematical set for solution of the outlined problem including the realization in the discrete form. The simplicity and efficiency of the system proposed make possible to perform its practical realization with the help of cheap FPGA. The test of the developed system has been performed in the medium Matlab.

Parole chiave

  • power systems
  • intellectual systems
  • harmonic components
  • ship
8 Articoli
Accesso libero

Inspection Program Development for an Aircraft Fleet and an Airline on the Basis of the Acceptance Fatigue Test Result

Pubblicato online: 28 Feb 2015
Pagine: 1 - 8

Astratto

Abstract

An inspection interval planning is considered in order to limit the probability of any fatigue failure (FFP) in a fleet of N aircraft (AC) and to provide an economical effectiveness of airline (AL) under the limitation of fatigue failure rate (FFR). A solution of these two problems is based on the processing of the result of acceptance fatigue test of a new type of aircraft. During this test an estimate of the parameter ϴ, of a fatigue crack growth trajectory has been obtained. If the result of this acceptance test is too bad then this new type of aircraft will not be used in service. A redesign of this project should be done. If the result the acceptance test is pretty good then the reliability of the aircraft fleet and the airline will be provided without inspections. For this strategy there is a maximum of FFP (a maximum of FFR) as a function of an unknown parameter ᶿ. This maximum can be limited by the use of the offered here procedure of the choice of the inspection number. The economic effectiveness of the AL operation is considered using the theory of Markov process with rewords.

Parole chiave

  • Monte Carlo
  • Markov chains
  • Minimax
  • inspection program and approval test
  • fleet reliability
  • economic effectiveness
Accesso libero

How to Train Safe Drivers: Setting Up and Evaluating a Fatigue Training Program

Pubblicato online: 28 Feb 2015
Pagine: 9 - 20

Astratto

Abstract

Fatigue is considered as a serious risk driving behavior, causing road accidents, which in many cases involve fatalities and severe injuries. According to CARE database statistics, professional drivers are indicated as a high-risk group to be involved in a fatigue-related accident. Acknowledging these statistics, a training program on driving fatigue was organized, aiming at raising awareness of professional drivers of a leading company in building materials, in Greece. Selected experimental methods were used for collecting data before and after the training program, which allowed monitoring and assessing the potential behavioural changes. A questionnaire survey was conducted before the program implementation to 162 drivers of the company, while two months after the program, the same drivers replied to a second questionnaire. Impact assessment of the program relied on statistical analysis of the responses. Results showed the degree of penetration of the training program in the professional drivers' behavior towards safe driving.

Parole chiave

  • fatigue
  • program
  • impact assessment
  • professional drivers
Accesso libero

Travel Behaviour of Online Shoppers in Sweden

Pubblicato online: 28 Feb 2015
Pagine: 21 - 30

Astratto

Abstract

Online shopping opportunities are transforming travel behaviour for shopping and could potentially reduce the overall travel demand. Despite numerous studies on online shopping, only a few have taken an approach that includes trips for all travel purposes. Based on a web–survey, this paper provides results on travel behaviour for physical shopping for frequent, regular, and infrequent online shoppers in Sweden. The results indicate that frequent online shoppers make as many car trips (for both shopping and other errands) as others. Also, frequent online shoppers in total make as many trips to a physical store as infrequent online shoppers – although by more sustainable modes of transport – and that the time saved from online shopping is spent on both additional shopping trips and trips for other errands. The conclusion is that online shopping might facilitate changing travel behaviour but does not in itself represent a good stand–alone measure for reducing vehicle mileage.

Parole chiave

  • Online shopping
  • travel behaviour
  • modal split
Accesso libero

Analysis of Common Governance Transport System Development Possibilities in the East-west Transport Corridor

Pubblicato online: 28 Feb 2015
Pagine: 31 - 39

Astratto

Abstract

Equitable access to efficient economic infrastructure and effective public services is essential to achieving the future economic growth. Insufficient transport infrastructure and long border crossing procedures limiting international accessibility for goods and passengers are the biggest present problems in the East-West transport corridor. The joint action plan must highlight the areas and components of the transport system, which are important for the effective interconnectivity of the individual networks, and/or for absorbing the steadily increasing intraregional and transcontinental freight flows. The successful East-West transport corridor activities' governance first of all needs to identify the corridor's administrative structure, non-governmental organizations' (NGO) place in the management structure, partnerships between the transport hubs in the EWTC mechanism and the possibility of cooperation between private and public sectors.

The latest events and constantly changing environment show that the impact of political solutions on business is prevalent in the CIS and the EU countries. Thus, the analysis of economic, political, managerial, legal, even moral aspects that affect the interests of the stakeholders remain significant.

Parole chiave

  • transport corridors
  • management
  • governance
  • planning
  • infrastructure
Accesso libero

Formation of Failure Models for the Evaluation of the Reliability of Supply Chains

Pubblicato online: 28 Feb 2015
Pagine: 40 - 47

Astratto

Abstract

Logistics and supply chain management is a comparatively new scientific field which has been rapidly developing.

Apart from the criterion of total logistics costs, that is used to evaluate the efficiency of supply chains, another criterion - total satisfaction of consumer needs - is being increasingly used for the same purpose. It can be explained by the transition to such new logistics concept as the sustainability of supply chains, which is characterized not only by flexibility, rate of response, strength, adaptability, but mostly by the reliability of functioning of the logistics system's elements.

The paper presents critical analysis of the existing approaches to the formation of failure models in supply chains, the methodical approach and classification of failures for the key logistics functions (purchasing, order processing, transportation, storage, warehousing and materials handling) as well as some developed and improved failure models for a number of logistics functions and operations; there have been also given some examples of calculating the reliability indices for the elements of the supply chain.

Parole chiave

  • supply chains
  • reliability
  • failures
  • calculation models
Accesso libero

Application of EPC Standards and Mobile Networks Services to Enhance the Quality of Postal Service

Pubblicato online: 28 Feb 2015
Pagine: 48 - 60

Astratto

Abstract

This article deals with new technologies and methods to optimize the transport and delivery of postal mails. Introduction of this article defines the technologies and procedures that postal operators have started to use. The main part of the article describes specific implemented solutions of several postal operators and their benefits. The last part shows using of EPC standards in a processes chain. The conclusion of the article is devoted to the evaluation of these technologies and their potential in the area of postal sector.

Parole chiave

  • delivery mails
  • mobile technology
  • post
  • RFID technology
  • EPC standards
Accesso libero

Development of the Model of Decision Support for Alternative Choice in the Transportation Transit System

Pubblicato online: 28 Feb 2015
Pagine: 61 - 72

Astratto

Abstract

The decision support system is one of the instruments for choosing the most effective decision for cargo owner in constant fluctuated business environment. The objective of this Paper is to suggest the multiple-criteria approach for evaluation and choice the alternatives of cargo transportation in the large scale transportation transit system for the decision makers - cargo owners. The large scale transportation transit system is presented by directed finite graph. Each of 57 alternatives is represented by the set of key performance indicators Kvi and set of parameters Paj. There has been developed a two-level hierarchy system of criteria with ranging expert evaluations based on Analytic Hierarchy Process Method. The best alternatives were suggested according to this method.

Parole chiave

  • Transport model
  • transit
  • decision support
  • Baltic Sea Region
Accesso libero

Modeling of Complex Structures for the Ship's Power Complex Using Xilinx System

Pubblicato online: 28 Feb 2015
Pagine: 73 - 82

Astratto

Abstract

One of the most essential tasks for a number of systems of the automatic controls in the autonomous electric power systems of the water transport is accurate calculation of variable harmonic components in the non-sinusoidal signal. In the autonomous electric power systems operating with full semiconductor capacity, the forms of line currents and voltages are greatly distorted, and generator devices generate voltage with inconsistent frequency, phase and amplitude. It makes calculation of harmonic composition of the distorted signals be a non-trivial task. The present paper provides a mathematical set for solution of the outlined problem including the realization in the discrete form. The simplicity and efficiency of the system proposed make possible to perform its practical realization with the help of cheap FPGA. The test of the developed system has been performed in the medium Matlab.

Parole chiave

  • power systems
  • intellectual systems
  • harmonic components
  • ship

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